A bout of pain in the abdomen at 36 weeks of pregnancy may be caused by preterm labor or labor, acute gastroenteritis, acute appendicitis and other diseases. 1. Preterm labor or labor: pregnant women in 36 weeks of pregnancy, a bout of pain in the abdomen, considering the possibility of uterine contractions caused by preterm labor or labor, to the hospital as soon as possible, if necessary, to give birth control or to assist in the delivery of the treatment. 2. Acute gastroenteritis: pregnant women in the 36th week of pregnancy, if the abdomen is cold or eat unclean food may cause acute gastroenteritis, pregnant women at this time will manifest abdominal pain, diarrhea, abdominal distension, nausea and other symptoms. 3. Acute appendicitis: pregnant women in the 36th week of pregnancy, if the sudden acute appendicitis will appear abdominal pain and discomfort, white blood cell elevation performance. Pregnant women in late pregnancy should pay attention to regular checkups, symptoms must be as early as possible to seek medical attention.